“Dancing with the Stars” pros Peta Murgatroyd and Maksim Chmerkovskiy are just one month away from their wedding, and they joined “Good Morning America” on Friday morning to share some of their pre-wedding workouts with a little help from son Shai.

The couple explained that they use Shai as a weight, holding him while doing sit-ups, lunges and squats, adding that it helps them bond as a family.

“I think that it’s a great bonding activity for the whole family to do,” Murgatroyd said. “At first we didn’t have anybody to look after Shai so we just took him along and it just became an every week thing. We take him to the gym now and we bond together over there.”

“I think if you introduce an activity like a gym, a workout at an early age, there’s nothing wrong with that,” Chmerkovskiy added.